Can't tell you what is wrong with the valves, but I can bet the issue is the fuse to the power cable to the camera.
Mine did the same thing. I replaced it three times. The third time, I traced the wire to the camera and located it on the right side on the upper storage area. The installers simply stuff the wire in the hole and it puts back pressure on the old style fuse which is spring loaded. So, driving down the road, the goes off and on as the power is connected/disconnected.
To fix it yourself, remove the right storage panel by removing the screws holding it to the frame. You may have to disconnect the DC wire to the outlet and AC outlet, but if you can, just move it out of the way. Look inside the lower center area and you will see a rat's nest of wires. The camera's power cable is among them. It should be a round fuse like you would find on an old radio. Untangle the mess, wrap some tape around it to keep the wire from moving, and maybe pull out the spring a bit, and your problem will likely disappear. It did for me.
As to reliability, here's my take, having owned both.
My Roadtrek RS Adventurous, purchased new, had one defect-a screw on the front bumper had shorted out the chassis temperature probe. Roadtrek paid for the repair. In four years, that was the only warranty issue. I did have to remove the house batteries and repaint the box they were in because acid had spilled out and it was starting to rust.
I traded it for the 2011 Interstate in March of 2011. On the drive home, I noticed a loud popping sound driving down the road, and smelled propane the first night I stayed in the unit on the way home.
Propane was caused by connector on range not tightened. Fixed it myself when I got home.
I tracked the popping sound down to the top of the galley rubbing on the wardrobe next to it. Took it to a dealer, who looked puzzled, and squirted a glob of Sika under the counter that did nothing. I later removed the counter top, moved it over 1/32" and put it back. Fixed.
When I got home, I removed the back seat to take a look at the electonics. I was stunned at the debris on the floor. Nothing was cleaned up-loose wires, insulation, pieces of wire that was stripped, etc., was on the floor. I vacuumed up as much as I could.
The Pyle monitor died. Airstream sent me another. It died, too. Then I simply bought a different model on Ebay for $30 as someone named Dan at Airstream refused to send me another one unless I drove it 250 miles to a dealer to check for wiring issues. Turned out he was right. It flickered on and off-unlike the Pyle units that worked and then died. Found the problem was the stuffing of wires on the fuse as I outlined above and fixed it myself.
The air vent fan broke off the hub. The manufacturer sent me a new one I installed myself. I can't blame Airstream for that issue.
The refrigerator was wired so it would run off the inverter and not 12vdc when not on shore power. Rewired it myself.
The macerator started leaking after the first winter. In looking at the design of the waste plumbing, the 3" line is lower than the macerator, and can never be emptied no matter how long you run the pump because it is half filled with air, so the pump won't pump after the tank is fully drained. So there is standing water in the hose and macerator at all times-and it will freeze in the winter, which is what happened to mine, even though I used anti-freeze through the line until pink came out the hose. Apparently, it is too diluted with the amount of water in the hose, which is significant. I replaced the macerator at my cost. Still working on a fix for winter.
The design of the shower requires opening the access panel to raise the cover on the toilet so it can't be used when closed. It adds only a couple of inches in the back and none at all anywhere else. I removed the panel closeouts and permanently closed the access panel. It is a stupid design.
After my first winter, I de-winterized and turned on the water. Water gushed out from inside the van. Turned out there is a check valve to the black tank flush line that holds water and breaks when it freezes. It would have been nice to know that it will freeze if not winterized. I removed it and fixed it myself. Be warned.
Several side panels came off because of inadequate service preparation. Repaired them myself which was very difficult.
Sewer hose would not spool up inside spool because hose was too long. Cut off about 3 feet and replaced the nozzle.
There is no insulation behind the bath which caused the bath to become a sauna in the sun. There is no insulation behind the streetside wardrobe either. I managed to place some reflextrix and insulation in the space behind the shower through the access panel that helped the issue but not perfectly. It was very difficult. There is a closeout on the wardrobe side, so I was not able to do anything about it. I may add some reflextrix on the inside of the wardrobe to keep it from becoming an oven.
The slider door window leaked. Took it to the dealer who replaced it. Continued to leak. While at Jackson Center, it was removed and replaced. I was told the wrong gasket was installed. Fixed at Jackson Center under warranty.
Trim on wardrobe came loose. Fixed at Jackson Center.
Smaller burner never would light. Fixed at Jackson Center.
Transfer switch never did work correctly. Turned out the bolt holding it near the battery was not tight, so it was not making a good connection so the house batteries would not charge while driving. Fixed at Jackson Center.
Finally, the shower never would drain. Water pooled on the curbside no matter how level or for that matter, unlevel on the curbside the unit was parked. The shower also developed a crack in the front right corner which was repaired twice, and reappeared three times. I took it 250 miles to a dealer who acknowledged the floor was not level, and who also admitted they were not inclined to take on the repair as it requires a complete tear out. Took it to Jackson Center, 847 miles. Five days, first denial there was an issue until I made them compare it to a new unit parked next to mine which drained and mine didn't, and much debate, a complete tear out later, the shower drains, at least on the floor (but not behind the toilet). The crack came back the next day (or was there when I drove off). I did have them completely block the windows with reflectrix and insulate the area behind the shower. It no longer gets hot.
All in all, though I guess it could be worse. But in my opinion Airstream is more interested in moving product than quality or design. While at the dealer, I met other owners who had similar stories. Wires wired backwards or loose connections. Heating vents crushed on trailers behind inaccessible walls. Frames that broke. Having multiple repairs for the same issue, etc. Granted, this was the service center where problems tend to be magnified, but the problems reported showed little concern for build quality.
This is what I have experienced with my Interstate. You can make your own decision as to the reliability of these units and hopefully, my experience will help you and others in that regard.
Originally Posted by UKDUDE
So last weekend I collected it from the dealer - and the list was finally down to zero and I was feeling pretty elated! But on the way back home I suddenly noticed the Pyle monitor was blinking off and on. The list was back!